i need science help. 10 questions.

Re: i need science help. 10 questions.


These questions look like senior high school chemistry and biology. I recommend you get a good text book which will answer most of these questions better than I have done.

Re: i need science help. 10 questions.
Thank you so much!!
At least someone is thoughtful enough to help! :wink:

The process is osmosis. The water from the veggie percolates thru the skin to dilute the salt solution. The tendency is to attain the same concentration in water. Nature hates a vacuum as well. Now you should use Google.

Fungus



Starch

I highlighted the answer for you.



Photosynthesis

Notice the seventh link from the top? It brings you to the relevant part of the article. The answer to question five is right there as well.



Photosynthesis again

If you need a more in depth answer, check out the first of the external links. (bottom of the page)

In short, respiration is reverse photosynthesis, only it releases chemical energy, not electromagnetic radiation (light).



Animal cell.

Notice the first sentence identifying the cell wall as an important distinction between annimal and plant cells, even provides a link to the cell wall page.

Cell wall

Answer: Plant cells are fixed in possition, encased in cell walls.



Active in what way? With no further specification I'd go with gass, based on higher temperature.



Osmotic_pressure



Osmosis



Osmosis



Notice how all your questions except the vague one about water, and the one concerning something NOT having happened, were easily answered by just shoving the word into the first online encyclopedia I could think of, and possibly following a link. That ought to send something of a message.

One can probably answer nr one as well in a couple of minutes worth of googling, but I'm too lazy to do other peoples homework if it takes more than just a minimum of effort (like copy-pasting a word to wikipedia). I'm sure you of all people will understand.

I still recomend reading the chapter in your textbook leading up to those questions though, the end of chapter summaries are meant to be an indicator of wether you've picked up on the gist of the chapter or not. I'd say you've failed miserably if you can't answer at least eight of those questions without looking them up.

1.What protist has not been successfully cultivated in the laboratory?
Dunutno

2. Name an organism that has both plant and animal characteristics.
A quick review is that it is the subject of question 1

3. What compound is usually identified by the use of iodine?
One of the structural differences between plant and animal cells is a feature called chloroplasts. Guess what chemical they produce that reacts with iodine. Enough so that iodine can be used as an indicator.

4. What important gas is released during photosynthesis?
Respiration bad air in, good air out, photosynthesis the other way around.

5. Contrast photosynthesis and respiration.
Among other things see Question 4

6. Is movement characteristic of plant or animal cells? Explain.
In quick or slow time? Cause most plants move in slow time. So my answer is no.

7. Molecules are the smallest possible particles of any compound. Are water molecules more active in gas, in liquid or in a solid state?
Is this in relation to diffusion? Cause diffusion is almost directly related to mean free path in most material, and the mean free of a vapor is greater than a liquid and solid

8. Under what circumstances does osmotic pressure occur?
Fascinating topic, semi permeable membranes. These membranes are able to go against diffusion and concentration selectively allowing one material to pass while restricting others. One of the more available semi permeable membranes lines the insides of cackle berries.

9. Why do dried prunes swell when soaked in pure water?
Diffusion and concentration. Nature abhors a concentration gradient

10. Why do cucumbers and some other vegetables shrink when placed in salt water?
See previous two questions. Salt (NaCl) is at high concentration outside the veggie and at low concentration inside. Nature doesn't like that. She wants everything to be equal, but most veggies have a semi permeable membrane that prevents salt to enter. So nature's option is to get equilibrium by taking the water out. Consequence, it shrinks. BTW it would be interesting to try the dried prune experiment in salt water.

Rap c∫/

Re: i need science help. 10 questions.


protista

thanks
thanks for the help talk72000, but can u believe it- i was almsot done with the assignment when i remebered that i asked for help here- scroll down to see what i got!!

thank you so much for the help einhenjar, but can u believe it- i was almsot done with the assignment when i remebered that i asked for help here- scroll down to see what i got!!

thanks
thanks for the help raprap but can u believe it- i was almsot done with the assignment when i remebered that i asked for help here- scroll down to see what i got!!

thanks
Enray- check out what i got!!

this is what i got for the 10 science questions!
I will post the answers i got- in a couple of days- so my school wont think that i copied it from somewhere- so just wait a while!!!

Re: i need science help. 10 questions.

Politicians.

Re: i need science help. 10 questions.


i was going to say slime molds.

Are they not the same thing ?
Ahhh no, sorry. Clearly no.
After all slime moulds are of some use to the planet at large.

when will you post them? i have the same questions for my bioligy questions.

man, you STILL haven't graduated?